Big improve on theme; Genral App Bar with settings menu; Option for delete all wallets on device

android/app/src/main/AndroidManifest.xml

@@ -11,7 +11,7 @@
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
     <application
         android:name="io.flutter.app.FlutterApplication"
-        android:label="gecko">
+        android:label="Ğecko">
         <!-- android:icon="@mipmap/ic_launcher"> -->
         <activity
             android:name=".MainActivity"